Combined diestock and tap wrench



Aug. 11, 1925. s, RIZZA COEBINED DIESTOGK AND TI' WRENGH Filed June 21. 1923 CII enaasrrano "amari,

F HARTFORD, CNNFG'ICUT.

COMBINED D11-351100K AND El-i1? "WRENC-I.

Application :filed June 21., 1923. Serial No. 648,928.

.To all whom t may conce/Mt:

Be it lrnown that i, Sinnnsrmro f a citizen ot the United States, and a residentoit Hartford, in the county of Hartford and State oit Connecticut, have invented certain new and useful `improvements in a @ombined Diestoclr and riap lilirench, ot which the 'following is a speciiication.

'Fhis invention relates to a die stoclr and tap wrench tor holding both dies and taps.

VUne oit the objects ot the invention is to provide an improved 'l'orin and arrange ment ot parts for a conibined tap wrench and die stoclr.

inother object` of the invention is to provide an improved device ot this character which may be used tor holding),l either a thread cutting die or a tap and which is adjustable itor the purpose of holding; taps having` various sized Shanks.

Another object ot the invention is to provide an improved i'orm oi" combined die stock and tap wrench in which a tap oit any desired size may be held without disturbing or removingl the die trom the die stock.

Another object is to provide yan improved unitary structure 'tor a combined die stocli. and tap wrench, which is convenient, easy to operate, strong, durable and inexpensive to manufacture.

@ther objects and advantages ot the invention will be in part obvious and in part pointed out hereinafter.

rFhe invention accordingly consists in the features of construction, combination of e1e ments and yarrangement oi parts which will be enempliiied in the Vconstruction hereinafter set :toi-th, and the scope of the application of which will be indicated in the appended claims.

in the drawing forming` a part ot this specification and in which similar reference characters refer to similar parts Figure 1 is a plan view ot a combined die stock and tap wrench embodying,l the features oi the invention;

Figure 2 is a longitudinal section ot the device shown in Figure 1 indicating,1 the operation ot' the various parts;

Figure 3 is an underside plan view ot the same device;

Figure i is an end view taken along` the line 4 4 of Figure 1;

Figure 5 is a sectional view taken along the line et Figure 1; and

Figure 6 is a view et the device, ali the parts being detached, and the method of assembling being indicated.

ltte'j'eii'ring to the drawings, the device comprises a body portion 10 with suitable arms 11 and 1L disposed at either side for rotating,7` the body, and provided on one side with an orifice as at 13 to receive a die, and on the other side havingl a stationary jaw ifi which, with a movable or clamping jaw 15, is adapted to grip the end of a tap, reamer, or other similar tool.

The. orifice 13 is suitably shaped to receive a die and may be circular or any other desired form. it extends part way into the body 10 to a depth substantially equal to the thickness ot the die to be held. rihe die is held within this oriice by suitable means, such as set screws 16, whichl are adapted to screw through the body 10 and wedge the die in place.

@n the side of the body 10 opposite the oriiice 13, the body is cut away to torm a jaw 11i integral with the body and to provide space ior the clamping jaw 15 to be moved bach and torth. The jaw 15 is in the forni ott a slide having, stepped side edges as at 1i" to engage with the sides ot a groove extending longitndinally of the body 10 as at 18 (Fig. li). rihe jaw 15 is thus slidable in the. direction oit and away from the stationary jaw lei. Suitable means are provided tor moving this j aw backward and iiorward, such as the threaded end 19 otu the arm 12 which is arranged to engage a threaded part Q0 on the jaw. The arm 12 is reduced somewhat at the threaded end 19, as indicated at 21, leaving a shoulder at each end ot the thread 19. The body 10 is cut aw y, as at 22, to receive the reduced portion of the arm 12, and is cut away slightly deeper at 23 to receive the threaded part 19 or the arm. Between these two out away parts 22 and 23 there is formed a shoulder Qliagainst which the forward end ot the thr aded portion 19 abuts to form an end thrust bearing. A thrust bearing` for the other end of the threaded part 19 is provided by a plate 25 which is generally rectangular, being cut away as at 26 to permit the jaw 15 to slide therethrough. The plate 25 is held in place against the body 10 by means of screws 27.

The operation of the device, as a tag wrench, may be understood from the forcgoing description. lt will be noted that upon rotation oit the arm 12, the clamping; jaw may be moved to engage a tap or simi-l lar tool in cooperation with the stationary jaw ld. Upon rotation ot the arm l2 in the opposite direction, the jaw l5 may be withdrawn and the tap removed.

Among other advantages, it will be noten, that in order to use the device as a tap wrench, it is not necessary to remove the die, since this does not interfiere with the operation of the tap in any way.

'lt will also be noted that none of the parts of the combined structure need be removed in order to use it for any of the purposes tor which it is designed, and that, therefore, there is not the danger of parteI bein misleid and lost, or any loss of time in adapting` it tor the desired operation. lf the tap is oiL comparatively small diameter, its center will be somewhat out of the center of the body l0 which will cause a slight unbalancing` et the device. rl`his may 'oe compensated by unsci-owing,I the handle 28 on the arm li so that it projects further from the center ot the body l0. ln this manner also the leverage provided by the two arms may be balanced so that a more nearly equal p-ull may be had on each side when the tap is not exactly at the center of the bot y.

lt it be desired to use a die o1Q an outer diameter smaller than the oriiice 13, such as '.tor instance, tl indicated at Q9, a ring er bushing 30 may be inserted with the die in the oriiice to till the excess space. rl`he ring 30 will have diametrically spaced openings 3l through which the inner ends of the screws 16 will protrude to engage the periphery of the die 29.

Thus by the above construction are accomplished, amongY others, the objects hereinbetore referred to.

As many changes could be made in the above construction and many apparently widely different embodiments of this invenmeegaat tion could be made without departing from the scope thereof, it is intended that all 'ster contained in the above description the accompanying drawing shall -ed as illustrative and not in a o: shonui in l internre limiting)Y Sens@ is also to be understood that the lanused in the followingv claims is ind to cover all of the generic and spertures of the invention herein deand all statements ol' the scope o'i ition which, as matter of lani 't be said to jall therebetween.

my invention:

- vice o the character described,

scribe d gli opening providing at one a or scat adapted l said seat, jaws on adapted to et;-

opposite jaws being,` integral bloei: forming shoulder the bottom of said die seat, the jaws beingdovetailed into for sliding` movement towards m sait iirst jaw, a pair or from said bloclr for turningh Y. a connection het veen one t saitL broch n Y Lne device,

oi said arms and said slinable jaw for b ,1- red against longitudina.. portion.

SEBASTN@ ltZZA.

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